Plain water is water. An electrolyte drink is water with sodium, potassium, and usually other minerals or sugar added to it. That's the actual difference. Whether that addition matters for a given person, on a given day, is a separate question, and the evidence on it is narrower than either "you always need it" or "you never do."
What's In Each
A glass of tap or bottled water is, chemically, water. An electrolyte drink starts from the same water and adds dissolved minerals, most commonly sodium and potassium, sometimes magnesium or calcium, and in many commercial products, sugar or a sweetener to make the taste work. That's the entire compositional difference. Nothing about the water itself changes. What changes is what's dissolved in it.
What the Added Minerals Are Actually For
Sodium and potassium do a specific job: they help the body hold onto and move fluid, which matters most when a lot of both fluid and sodium are being lost quickly. The evidence on when that actually happens is narrower than the marketing around it suggests: sustained, intense exercise, especially in heat, typically beyond about an hour; illness involving vomiting or diarrhoea, which is what NHS oral rehydration salts are formulated for; and specific medical conditions or medications, where a clinician's guidance applies, not a drink's marketing.
Anyone managing a kidney condition, heart condition, high blood pressure, or medication that affects fluid or sodium balance should get that guidance from their own clinician, not from a drink label.
Why Composition Isn't the Same as Need
None of that means water is better or electrolyte drinks are worse. It means the two aren't solving the same problem for most people on most days. The Institute of Medicine's own reference work on water and electrolytes states plainly that sodium deficiency from an ordinary diet doesn't normally happen, and that even fairly heavy sweating usually doesn't create a need for salt on top of a normal diet. For most healthy adults eating normally, water plus what's already in a typical diet covers what an electrolyte drink adds. That's a finding about baseline need, not a claim that electrolyte drinks don't do what they say.
What the Evidence Doesn't Settle
Two things complicate a tidy answer. First, how much sodium an individual loses through sweat varies substantially between people, and even for the same person across different conditions. A single rule, in either direction, doesn't fit everyone. Second, exactly how much sodium is too much is still debated: some research suggests both very low and very high intake carry more risk than a middle range, and where that middle range sits precisely isn't settled. The World Health Organization's own recommendation, under 2,000mg a day for adults, sits on the more cautious end of that debate, not at its unresolved centre.
Where 0800Labs Sits
0800Labs' own formula doesn't include electrolytes. That's not a claim that water is always sufficient for everyone in every situation, and it isn't a claim against electrolyte drinks as a category. It's a decision scoped to the occasion we're actually building for: a desk-based working day, not sustained exercise, illness, or a medical situation where the evidence above points somewhere else.
Why 0800Labs Is Interested
This is the same reasoning behind why we don't describe 0800Labs as a sports hydration brand. The moment we're interested in is the pause inside a working day, not a situation the evidence above already has a clear, different answer for.
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